The PN3-Tool (former PN3-Editor) is a Petri Net Tool for the Specification of Communication Protocols.
Environment: MS Windows 3.x/95/98/NT
Origin: Institute for Automation & Control Processes, Far East Branch of the Russian Academy of Sciences, Vladivostok, Russia
Authors: Nikolay Anisimov, Alexey Kovalenko, Pavel Postupalski, Dmitri Kharitonov

Contact: Dr. Nikolay Anisimov, E-Mail:,
Kind of Nets supported:
Black and white Petri Nets, Petri Net Entity
Can be downloaded [exe, 2 325KB] [zip, 954KB] for FREE! (as it is).
Zip file contains the program fime (Sds_vc.exe) and several examples (.pnt files):

Notes: The Project has been completed in 1997